package com.saris.primego.config.interceptor;

import com.saris.primego.common.constant.JwtClaimsConstant;
import com.saris.primego.common.context.BaseContext;
import com.saris.primego.common.properties.JwtProperties;
import com.saris.primego.common.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenAdminInterceptor implements HandlerInterceptor {

    private final JwtProperties jwtProperties;

    public JwtTokenAdminInterceptor(JwtProperties jwtProperties) {
        this.jwtProperties = jwtProperties;
    }


    public boolean preHandle(@NonNull HttpServletRequest request, @NonNull HttpServletResponse response, @NonNull Object handler) throws Exception {

        // 输出当前线程的Id
        log.info("当前线程的Id：{}",Thread.currentThread().threadId());

        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getAdminTokenName());

        //2、校验令牌
        try {
            log.info("jwt校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getAdminSecretKey(), token);
            Long empId = Long.valueOf(claims.get(JwtClaimsConstant.EMP_ID).toString());

            // 存入ThreadLocal中，线程存储空间
            BaseContext.setCurrentId(empId);

            log.info("当前员工id：{}", empId);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
}
